Draft Pressure Transmitter 985

Product Details:

Display Analog
Bourdon Tube Stainless Steel
Seal Material NBR Rubber
Sensor Type Differential Pressure Sensor
Outer Size 110 mm
Grade Industrial
Thread 1/4 BSP
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Draft Pressure Transmitter 985 Product Specifications

Bourdon Tube Stainless Steel
Accessories Mounting Bracket
Finishing Powder Coated
Pointer Material Aluminum, Black Painted
Sensor Type Differential Pressure Sensor
Processing Type Casting
Seal Material NBR Rubber
Outer Size 110 mm
Thread 1/4 BSP
Grade Industrial
Mount Type Panel or Surface Mount
Glass Size 100 mm
Dial Material White Aluminum Sheet
Display Analog
Scale Range 0-1000 mmWC
Accuracy 1.6 % F.S.
Material Aluminum Die Cast
Measure Pressure Of Air and Non-Corrosive Gases
Diameter 100 mm

Product Description

Applications :

Building automation and air conditioning systems
Overpressure measurement in clean rooms and laboratories
Measurement of constant pressure in VAV applications
Dynamic filter and ventilator monitoring

Technical data :

985M 2-wire with manual offset calibration

Setting ranges:
Depending on type between -100 Pa and 1 bar
Temperature range:
Working and storage temperature from 20C to +70C
Process connection:
Hose connection with 4 / 6 mm outer diameter
Supply voltage:
18 to 30 VDC
Output signal:
4 20 mA
Electrical connection:
Plug-in terminals for wires and strands up to 1.5 mm2 or
circular connectors M12 / 4-pole
Protection class:
IP65 acc. to EN 60529

985M 3-wire with automatic offset calibration

Setting ranges:
Depending on type between -100 Pa and 1 bar
Temperature range:
Working and storage temperature from 20C to +70C
Process connection:
Hose connection with 4 / 6 mm outer diameter
Supply voltage:
18 to 30 VDC
Output signal:
0 10 V
4 20 mA
Electrical connection:
Plug-in terminals for wires and strands up to 1.5 mm2 or
circular connectors M12 / 4-pole
Protection class:
IP65 acc. to EN 60529

985A 3-wire with automatic offset calibration

Setting ranges:
Depending on type between -100 Pa and 1 bar
Temperature range:
Working and storage temperature from 10C to +50C
Process connection:
Hose connection with 4 / 6 mm outer diameter
Supply voltage:
18 to 30 VDC
Output signal:
0 10 V
4 20 mA
Electrical connection:
Plug-in terminals for wires and strands up to 1.5 mm2 or
circular connectors M12 / 4-pole
Protection class:
IP65 acc. to EN 60529

985Q 3-wire with automatic offset calibration

Setting ranges:
Depending on type between -100 Pa and 1 bar
Temperature range:
Working and storage temperature from 10C to +50C
Process connection:
Hose connection with 4 / 6 mm outer diameter
Supply voltage:
18 to 30 VDC
Output signal:
0 10 V
4 20 mA
Electrical connection:
Plug-in terminals for wires and strands up to 1.5 mm2 or
circular connectors M12 / 4-pole
Protection class:
IP65 acc. to EN 60529

Reliable Performance for Industrial Applications

Engineered for the rigors of industrial settings, the Draft Pressure Transmitter 985 withstands environmental challenges thanks to its IP65-rated enclosure and solid build. Its accurate differential pressure measurement and rapid response time of less than 200 ms make it ideal for monitoring air and non-corrosive gases. With CE certification, users are assured of quality, compliance, and operational safety.

Versatile and Hassle-Free Installation

Designed for easy integration, this transmitter offers flexible mounting optionspanel or surface mountsuitable for varied industrial uses. The supplied mounting bracket simplifies setup, while its compact size ensures it fits well within instrumentation panels. Its 1/4 BSP thread and NBR rubber seal maintain a tight, reliable connection in your processes.

FAQs of Draft Pressure Transmitter 985:

Q: How do I correctly install the Draft Pressure Transmitter 985?

A: For optimal performance, mount the transmitter vertically using the provided mounting bracket on either a panel or flat surface. Ensure that the 1/4 BSP threaded connections are properly sealed with the included NBR rubber material, and connect the 24V DC power supply before operation.

Q: What industries can benefit from using this pressure transmitter?

A: This transmitter is suitable for various industrial environments such as HVAC, cleanrooms, and process control systems where monitoring air and non-corrosive gas pressures is essential. Its CE marking, durable construction, and IP65 protection make it a reliable choice for demanding applications.

Q: When should I use the Draft Pressure Transmitter 985s overload limit?

A: It is designed to safely handle momentary exposure up to 120% of its full scale (1000 mmWC). This feature protects the sensor during unexpected pressure surges, ensuring continued accurate performance and preventing device damage.

Q: Where should I locate the transmitter for best accuracy?

A: For best results, install the device in a stable, vibration-free location within the specified operating temperature range (-10C to +60C). Ensure vertical mounting to preserve measurement accuracy and reduce potential installation-induced errors.

Q: What is the process for connecting the output signal to my monitoring system?

A: Connect the analog 4-20 mA output wires from the transmitter to your data acquisition or monitoring system following the wiring schematic provided in the manual. Use shielded cables to prevent signal interference for precise differential pressure readings.

Q: What are the primary benefits of the Draft Pressure Transmitter 985?

A: Users benefit from rapid response times (<200 ms), reliable measurement accuracy (1.6% F.S.), a robust and powder-coated die cast design, and simple integration into industrial control panels. The IP65 ingress protection and CE certification ensure durability and compliance with global standards.

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